UPSC Exam  >  UPSC Tests  >  Science & Technology for UPSC CSE  >  Test: Combustion & Flame- 1 - UPSC MCQ

Test: Combustion & Flame- 1 - UPSC MCQ


Test Description

10 Questions MCQ Test Science & Technology for UPSC CSE - Test: Combustion & Flame- 1

Test: Combustion & Flame- 1 for UPSC 2024 is part of Science & Technology for UPSC CSE preparation. The Test: Combustion & Flame- 1 questions and answers have been prepared according to the UPSC exam syllabus.The Test: Combustion & Flame- 1 MCQs are made for UPSC 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Combustion & Flame- 1 below.
Solutions of Test: Combustion & Flame- 1 questions in English are available as part of our Science & Technology for UPSC CSE for UPSC & Test: Combustion & Flame- 1 solutions in Hindi for Science & Technology for UPSC CSE course. Download more important topics, notes, lectures and mock test series for UPSC Exam by signing up for free. Attempt Test: Combustion & Flame- 1 | 10 questions in 10 minutes | Mock test for UPSC preparation | Free important questions MCQ to study Science & Technology for UPSC CSE for UPSC Exam | Download free PDF with solutions
1 Crore+ students have signed up on EduRev. Have you? Download the App
Test: Combustion & Flame- 1 - Question 1

What are the three essential requirements for producing fire?

Detailed Solution for Test: Combustion & Flame- 1 - Question 1

The three essential requirements for producing fire are fuel, air (to supply oxygen), and heat (to raise the temperature of the fuel beyond the ignition temperature). Fire can be controlled by removing one or more of these requirements.

Test: Combustion & Flame- 1 - Question 2

Combustion is a _____ chemical reaction:

Detailed Solution for Test: Combustion & Flame- 1 - Question 2

Burning of any substance in presence of oxygen is called combustion. During combustion heat is evolved so, combustion is exothermic chemical reaction in which new substance is formed.

Test: Combustion & Flame- 1 - Question 3

Substance that burns in oxygen to produce heat and light is called :

Detailed Solution for Test: Combustion & Flame- 1 - Question 3

Those substances that burn in presence of oxygen to produce heat and light is called combustible substance. Fossil fuels, wood, paper etc are example of combustible substance.

Test: Combustion & Flame- 1 - Question 4

The gas used in fire extinguishers is

Detailed Solution for Test: Combustion & Flame- 1 - Question 4

Carbon dioxide gas is used in fire extinguisher to cut the oxygen supply.
Option A is correct.

Test: Combustion & Flame- 1 - Question 5

Which fuels are used for running automobiles?

Detailed Solution for Test: Combustion & Flame- 1 - Question 5

Diesel is more combustible than these fuels,it releases energy rapidly.

Test: Combustion & Flame- 1 - Question 6

What are the main characteristics of a good fuel?

Detailed Solution for Test: Combustion & Flame- 1 - Question 6

A good fuel should be readily available, inexpensive, burn easily in air at a moderate rate, produce a large amount of heat, and leave behind no undesirable substances. These characteristics make the fuel efficient and practical for use.

Test: Combustion & Flame- 1 - Question 7

Amount of heat energy produced on complete combustion of 1kg of fuel is called :

Detailed Solution for Test: Combustion & Flame- 1 - Question 7

The amount of heat energy released on complete combustion of 1 kg of fuel is called calorific value of that fuel. Higher the calorific value better the fuel is considered.

Test: Combustion & Flame- 1 - Question 8

Complete combustion of CH4 gives:

Detailed Solution for Test: Combustion & Flame- 1 - Question 8

In a combustion reaction, a substance reacts with oxygen from the air and transfers energy to the surroundings as light and heat.
The products of a complete combustion reaction include carbon dioxide(CO2) and water vapor(H2O).
CH4+2O2 - > CO2+ 2H2O
Hence, option A is correct.

Test: Combustion & Flame- 1 - Question 9

What is the calorific value of a fuel?

Detailed Solution for Test: Combustion & Flame- 1 - Question 9

The calorific value of a fuel is the amount of heat energy produced when 1 kg of the fuel is completely burned. This value indicates the efficiency of the fuel in terms of heat production.

Test: Combustion & Flame- 1 - Question 10

Lowest temperature at which a substance catches fire is called its :

Detailed Solution for Test: Combustion & Flame- 1 - Question 10

The lowest temperature at which substance catch fire is called ignition temperature. The fuel with moderate temperature is considered better fuel for domestic use.

146 videos|353 docs|249 tests
Information about Test: Combustion & Flame- 1 Page
In this test you can find the Exam questions for Test: Combustion & Flame- 1 solved & explained in the simplest way possible. Besides giving Questions and answers for Test: Combustion & Flame- 1, EduRev gives you an ample number of Online tests for practice

Up next

146 videos|353 docs|249 tests
Download as PDF

Up next

How to Prepare for UPSC

Read our guide to prepare for UPSC which is created by Toppers & the best Teachers
Download the FREE EduRev App
Track your progress, build streaks, highlight & save important lessons and more!